Here's a fun and easy experiment to do with your kids in a slow moment of the day. All you need is five toothpicks, a plate, a straw and a glass of water.
Snap your toothpicks in half but don't separate them completely. Arrange the broken toothpicks equally apart in a circle. Use the straw to put just a drop of water in the center of the toothpicks. After a little bit of time, the waterlogged toothpicks start to straighten themselves again. This effect brings the ends together forming a star.
Be prepared to impress as the star forms itself! Here's our video of how it worked for us in high speed.